Diffusion is the spontaneous movement of a substance from an area of what

The accessory pigment found in red algae that are especially good at absorbing blue light are

What is an advantage of using solar energy A. Solar energy is available without any equipment. b. Solar energy is available everywhere. c. Solar energy is inexpensive D solar energy produces no pollution

What term refers to enzymes ability to speed up reactions

Which is an organic molecule? a. hydrochloric acid (HCl) b. methane (CH4) c. water (H2O) d. carbon dioxide (CO2) e. oxygen (O2)

Arrange the steps below in the correct order to describe how a reflex occurs: A relay neuron sends a signal to a motor neuron. A sensory neuron sends a signal to the spinal cord. A muscle receives a signal to contract. A bone moves.

When earth completes a full rotation how much time has elapsea a. 1 day b. 1 month c. 1 week d. 1 year

Which is a problem associated with a declining population size? A. An aging population B. Scarce food supplies C. Limited health care

What can happen as Argentine ant colonies grow and split off to make new colonies?

The primary role of oxygen in cellular respiration is to

In snapdragons, red flower color (R) is incompletely dominant to white (r), with heterozygous plants being pink. The broad-leaf allele (B) is incompletely dominant over narrow leaves (b), with the heterozygous plants having medium-width leaves.